广义S变换及在地震波形处理中的应用  

Application of generalized stransform in seismic waveform processing

作　　者：张鹤翔[1] 李红光[2] 庄需芹[1] 张丽娟[1] 

机构地区：[1]防灾科技学院基础部,河北三河065201 [2]中国地震应急搜救中心工程部,北京100049

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第6期850-854,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：中央高校基本科研业务费专项基金资助项目(ZY20120206)

摘　　要：为解决标准S变换中高斯窗口不能随信号的特点而改变的问题,引入广义S变换方法,推导广义S变换公式,使用Matlab语言编写计算程序,对地震面波和背景噪声数据进行了降噪处理.与去噪前的信号进行比较,研究结果表明:利用广义S变换降噪方法在处理地震波形时能很好地去掉信号中的低频噪声,有效信号更容易分辨出来.广义S变换能根据信号特征改变高斯窗口大小,从而更好反映信号和噪声特征,提高信号降噪的效果.In order to solve the problem that the Gauss window of the standard S transform can’t change along with the signal characteristics, this paper introduced the generalized S transform method. Denoising the seismic surface wave and background noise data by the derivation of generalized S transform and Matlab language program, this paper compared the signal denoising with the original signal. The result of study shows that using the generalized S transform denoising method in the processing of seismic waveform can remove the low frequency noise well, and the effective signal is easier to distinguish. The generalized S transform can change the size of Gauss window according to the signal characteristics, which is better in reflecting the signal and noise characteristics and improves the effect of signal.

关 键 词：广义S变换 非平稳信号分析 面波 背景噪声 信号处理 

分 类 号：P315[天文地球—地震学]